Hayden Christensen has fuelled rumors his romance with former fiancee Rachel Bilson is back on - by admitting there is "photographic evidence" of them together.

The couple reportedly rekindled its relationship in November, three months after calling off the engagement.

New pictures of the pair emerged over the weekend, and now Christensen has refused to shoot down reports their romance is back on.

He tells New York Post gossip column PageSix, "(Those images are) photographic evidence, you can't deny that."

The couple became engaged in December 2008 but parted ways in August amid reports they were struggling to maintain a long-distance relationship, with the former The O.C. actress living in California and the Star Wars hunk in his native Canada.

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